Curated OER
Representing Rational Numbers
Seventh graders explore rational numbers. In this fractions, decimals, and percents lesson, 7th graders identify and compare equivalencies between fractions, decimals, and percents. Students use hands-on activities to investigate the...
Illustrative Mathematics
Illustrative Mathematics: k.oa Shake and Spill
The purpose of this task is for students to decompose a number as a sum of two other numbers in more than one way. Students will shake and spill 5 two colored counters and determine how many of each color is showing and record the sum...